html, body {
  font-family: -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Microsoft YaHei, Source Han Sans SC, Noto Sans CJK SC, WenQuanYi Micro Hei, sans-serif;
  font-size: 14px;
  width: 100%;
}

ol, ul {
  margin-left: -25px;
}

h1 {
  text-align: center;
}

.container > h1 > sup > a {
  margin-left: -5px;
}

h5 {
  margin-left: -5px;
  background-color: #e9ecef;
  display: inline-block;
  padding: 3px;
  border-radius: 3px;
}

.jumbotron {
  padding: 5px 0;
  border-radius: 0;
}

li {
  margin: 6px 0;
}

li.fold-panel > ul,
li.fold-panel > ol {
  display: none;
}

li.fold-panel:hover > ul,
li.fold-panel:hover > ol {
  display: block;
}

a:link {
  text-decoration: none;
  padding: 3px;
  border-radius: 3px;
}

a:hover {
  background-color: #e9ecef;
  color: #bd4147;
}

.opacity {
  opacity: 0;
}

sup {
  cursor: pointer;
  color: #bd4147;
}

.arrow-icon {
  background-image: url(../images/top.png);
  width: 30px;
  height: 30px;
  display: block;
  background-size: contain;
}

.scroll-top {
  cursor: pointer;
  position: fixed;
  right: 20px;
  bottom: 60px;
  width: 40px;
  height: 40px;
  padding: 5px;
  background-color: #007BFF;
  border-radius: 50%;
  transition: all 0.3s ease;
  box-shadow: 0 0 3px 0 rgba(0, 0, 0, 0.12), 0 3px 3px 0 rgba(0, 0, 0, 0.24);
}

.app-footer {
  padding: 1em 0;
  margin: 1em 0 0 0;
  text-align: center;
  background: #E9ECEF;
}

div object {
  display: none;
}

@media screen and (max-width: 768px) {
  .row .col-md-2, .row .col-md-3 {
    border-right: none;
  }

  .scroll-top {
    right: 20px;
    bottom: 60px;
    z-index: 9;
  }
}

@media screen and (min-width: 768px) {
  .col-md-3:not(:last-child), .col-md-2:not(:last-child) {
    border-right: 1px dashed #bd4147;
  }

  .scroll-top {
    right: 20px;
    bottom: 60px;
    z-index: 9;
  }
}